Lamp-socket



C. J. KLEIN.

LAMP SOCKET.

APPLICATION FILED MAY 26, I916.

1,;85'7A04., Patented NOV. 2, 1920,.

Ag ,GXXM/w which the socket is associated.

UNITED \STATES PATENT OFFICE.

CHARLES J. KLEIN, OF- MILWAUKEE, WISCONSIN, ASSIG-NOR TO THE CUTLER- HAMMER MFG. (20., OF MILWAUKEE CONSIN.

, WISCONSIN, CORPORATION OF WIS- LAMP-SOCKET.

Application filed May 26,

To all whom it may concern:

, Be it known thatl, CHARLES J. KLEIN, a citizen of the United States, residing at Milwaukee, in the county-of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Lamp-Sockets, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to lamp sockets and more particularly to those adapted for flush or concealed mounting within a door casing.

An object of the invention is to provide a lamp socket of the aforesaid character with a control switch combined therewith in unit relation. 1

Another object is to provide a lamp socket with a lamp holder subject to projection and retraction for exposure and concealment of the lamp and with a switch controlled by the movement of said holder, the latter being subject to operation by the door with Other objects will hereinafter appear.

In the accompanying drawing, wherein are illustrated certain embodiments of the invention.

Figure 1 is an enlarged longitudinal sectional View of a preferred form of lamp socket;

Fig. 2 is an elevation of Fig. 1;

Fig. 3 is a bottom plan view in an upward direction of the socket illustrated in the preceding figures;

Fig. 4, is a vertical section View ofa modified construction, while Fig. 5 is a plan view of the base and lamp holder shown in Fig. 4, the face plate and lamp not bein shown.

Referring to Flgs. 13, the socket in eludes a cylindrical casing 1 having an an nular base 2 of insulating material mounted within the-lower end thereof and retained therein by an inturned flange 8, said casing being providediat it's ogposite endwith an out-turned flange 4:. bodily movable lamp holder 5 is slidingly fitted within the casing 1 and normally projects an appreciable distance therebeyond, said holder being retained within said casing by means of a lug 6 onthe former engaging within an L-shaped slot 7 in the latter. The inner end of said holder is inturned at 8 providing an annular shoulder for rigidly engaging the Specification of Letters Patent.

I 1916. Serial No. 99,963.

lamp socket proper 9 which is cylindrical in shape and projects downwardly within the casing l.

Rigidly mounted within the'inner end of a depression 18 of the base 2. A coil spring 19 is interposed between the head 15 of the operating member 14 and the bottom of the counterbored portion 12 .of the base 10 for maintaining said operating rod in projected position. An incandescent lamp 20 is removably secured within the lamp socket 9 in any convenient manner, for example, by means of a bayonet joint 21, the spring 19 being compressed upon the insertion of the lamp within the socket whereby the head of the operating rod 14 is maintained in contact with the central terminal of the lamp 20.

The fixed contact 17 is electrically connected with a line terminal screw 22 (shown in. Fig. 3) by means of a hollowarivet 23 extending through the base 2, the contact member 17, and a conducting strip 24, which latter is in electrical engagement with the said screw 22, the said rivet serving to clamp the said parts together. The return circuit from the lamp-20 is through the socket 9, holder 8, easing 1, and the inturned flange 3 to a second terminal screw 25 engaged within said inturned flange. A second coil spring 26 surrounds the lamp socket 9 and is interposed between the shoulder 8 and an annular disk 27 lying upon the upper face of the base 2, said spring tending to project said holder.

In practice the casing 1 may be mounted within a door casing with the flange 4t ,lying flush with the surface thereof and the lamp holder 5 projecting therebeyond, and

Patented Nov. 2, 1920.

in uch relation as to be engaged by the holder 5 will therefore move inwardly therewith whereby near the limit of such movement the movable contacts 16 are disengaged from the fixed contact 1? thereby interrupting the lamp circuit and extinguishing the lamp. Upon opening of the door the lamp holder 5 and its attached parts move forward under the resiliency of the spring 26 thereby reengaging the movable contacts 16 wit-h the fixed contact 17 for lighting the lamp, the light from which radiates through the open end of the lamp holder and also through a circular orifice 28 in the side thereof, it being especially noted that the lamp is lighted when in projected position whereby the light therefrom is utilized to the fullest extent.

The transverse section of the slot 7 is provided to cooperate with the outwardly struck stud ti on the lamp holder 5 to restrain the same against outward movement, whereby the holder is maintained in retracted position with the attached lamp extinguished, irrespective of the position of the door. A slight turn of the holder when in telescoped relation is sufficient to cause such engagement and prevent lighting of f the lamp, while a similar slight turn in the opposite direction serves to disengage said lug from said transverse slot portion thus rendering the lamp operative.

During assembling, the stud 6 traverses the longer parallel section of the slot '7 which extends to.an"d across the fiange l to permit entry of the said stud.

The construction illustrated in Figs. 4 and 5 comprises an insulating base :29 fixed to and supported by a suitable face plate 30, said base having a socket 31 fixed to one side thereof by means of'sc'rews 32 for supporting a lamp 33. A spring contact 34 is mounted upon the base 29 by means of a bolt 35 to close circuit between the central contact of the lamp and a terminal screw 36 by means of a conductive, strip 37. The return of the lamp circuit is tllI'01 1 the socket 3]., screws 32 and conductive strip 38 to terminal crew 39. An elongated push button. member 40, preferably constructed of non-conductive material, extends through alined openings in the base 29 and face plate 30, its outer end projecting an appreciable distance beyond the latter. The inner end of said member engages the spring contact 34 at a, point intermediate its ends.

In practice this unit is designed to be mounted within a door casing with the face plate 30 flush with the surface thereof, said face plate thus protecting the lamp from injury while permitting the passage of light through an opening 41 therein. The said opening is preferably of sufficient size to permit insertion or removal of the lamp therethrough when renewal of the same becomes necessary.

retract The ush button member 40 is thus positioned to be alternately engaged and released by closing and opening of the door, thereby interrupting and restoring the lamp circuit through the spring contact 4 in the manner already described.

What I claim as new and desire to secure by Letters Patent is:

1. In a unit for flush mounting, in combination, a supporting casing adapted for flush mounting, a lamp holder carried therein and movable to axially project and retract the lamp carried thereby with respect to the flush face of said support, and a switch for said lamp connected to said holder and operable thereby to respectively make and break circuit upon projecting and retracting movements thereof.

2. In a unit for flush mounting, in combination, a flush support, a lamp holder supported thereby and mounted for projecting and retracting movements axially of the lamp carried thereby with respect to the flush face of said support, a lamp switch connected to said holder and operable thereby to respectively make and break circuit upon projecting and retracting movements thereof and means biasing said holder in projecting direction.

3. In a unit for flush mounting, in combination, a flush support, a. lamp holder supported thereby and axially movable for projection and retraction thereof, said holder having an actuating part projecting beyond the lamp carried thereby and being bodily retractable with its lamp to aflush posit-ion, means biasing said holder in projecting direction and a lamp switch mounted upon said support to be controlled by said holder according to the position of the latter.

4c. In a unit for flush mounting, in combination, a lamp holder, a lamp switch, a. unitary support therefor, said holder being mounted for projecting and retracting movement thereof axially of the lamp carried thereby and said switch being operable by such movement of said holder and means biasing said holder to projecting position, said support and said holder having interengaging means forretaining said holder in retracted position against said bias.

5. In a unit for flush mounting, in combination, a lamp holder, a lamp switch, a unitary support therefor, said-holder being mounted for projecting and, retracting movement with respect to said support, said switch being operable by said holder to close uring projection and open during retraction thereof, and means biasing said holder to projecting position, said support having a slot and said holder having a lug for engaging said slot to retain said holder in retracted position. with said switch open irrespective of said bias.

jecting and retracting movement therein, a

lamp switch mounted in said casin and operable by said holder to be closed during projection'and open during retraction thereof and means biasing said holder toward projecting position, said casing having a slot, and said holder having :1 lug for traversing said slot,

w 7. In a unit for flush mounting, in combination, a flanged tubular casing for flush amounting, a lamp holder mounted for projecting and retracting movement therein, a lamp switch mounted in said casing and operable by said holder to be closed during projection and open during retraction thereof, a base carried by said casing at its inner end, a spring restrained between said base and said holder for biasing the latter toward projecting position, said casing having an I angular slot for traversing the straight portion of said slot, said lug being adapted to be engaged within the restraining saidholder in retracted position.

8. A unit for flush mounting comprising,

a unitary support, a lamp switch and a reciprocable lamp holder carried by said support, a lamp mounted port, a conductive operating rodslidably mounted in said holder, resilient means biasing said rod to engage a conductive portion of said lamp and a contact carried by said rod and adapted to engage said fixed contact.

In witness whereof I have hereunto subscribed my name;

CHARLES J. KLEIN.

"and said holder having a lug,

in saidholder, said switch including a contact fixed to said supangular portion of said slot for 

